looking for John Ferreira from Madeira

My g-grandfather, John Ferreira, left Madeira with wife, Maria and 3 children, Manuel, Jennie and Emma about 1868 or 1869and eventully settled in Jacksonville, Morgan Co. IL. The name was changed toSmith sometime after their arrival in US. Manuel lived in Longview, Champaign Co. Il and married Margaret Haydock in 1896. Jennie moved to Alberta Canada after she married Lois Baptist in 1886. Emma married Samuel Hembrough in Jacksonville in 1896 and lived in Franklin, Morgan Co. Il. any information on John and Maria would be appreciated.